docs: def _get_qsize(tuning, width):
      """Return a reasonable quarter note size for 'tuning' and 'width'."""
      names = [x.to_shorthand() for x in tuning.tuning]
      basesize = len(max(names)) + 3
      barsize = ((width - basesize) - 2) - 1
  
      # x * 4 + 0.5x - barsize = 0 4.5x = barsize x = barsize / 4.5
      return max(0, int(barsize / 4.5))